COMMON LANGUAGE®
Location Codes:
CLLI™ Codes Technical Description
How Are CLLI Codes Used?
COMMON LANGUAGE Location Codes (CLLI Codes) are used worldwide to identify and describe three types of locations:
- Network sites: These include such network locations as central office buildings, business and commercial offices, microwave radio structures and earth stations.
- Network support sites: These include such locations as international boundaries or crossing points, end points, fiber nodes, cable and facility junctions, manholes, poles and repeaters.
- Customers sites: These include customer locations and associated circuit terminations, facilities or equipment for each specific customer.
How Are CLLI Codes Developed?
Each CLLI code conforms to one of three basic formats (Network Entity, Network Support Site and Customer Site). Each format, in turn, determines how these six coding elements are used:
- Geographical Codes
(Example: DNVR = Denver)
Typically assigned to cities, towns, suburbs, villages, hamlets, military installations and international airports, geographical codes can also be mapped to mountains, bodies of water and satellites in fixed-earth orbit.
- Geopolitical Codes
(Example: CO = Colorado)
Typically assigned to countries, states and provinces, geopolitical and geographical codes can be combined to form a location identifier that is unique worldwide.
- Network-Site Codes
(Example: 56 = A central office on Main Street)
This element is used with geographical and geopolitical codes to represent buildings, structures, enclosures or other locations at which there is a need to identify and describe one or more functional entities.This category includes central office buildings, business and commercial offices, certain microwave-radio relay buildings and earth stations, universities, hospitals, military bases and other government complexes, garages, sheds and small buildings, phone centers and controlled environmental vaults.
- Network-Entity Codes
(Example: DS0 = A digital switch)
This element can be used with geographical, geopolitical and network-site codes to identify and describe functional categories of equipment, administrative groups or maintenance centers involved in the operations taking place at a given location.
- Network Support-Site Codes
(Example: P1234 = A telephone pole)
This element can be used with geographical and geopolitical codes to identify and describe the location of international boundaries or crossing points, end points, fiber nodes, cable and facility junctions, manholes, poles, radio-equipment sites, repeaters and toll stations.
- Customer Site Codes
(Example: 1A101 = A customer)
This element can be used with geographical and geopolitical codes to identify and describe customer locations associated with switched-service networks, centrex installations; trunk forecasting, cable, carrier or fiber terminations, NCTE, CPE and PBX equipment, military installations, shopping malls, universities and hospitals.
Would a Picture Help?
Now let's try a graphical presentation of the same information:
